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Selected Quarterly Financial Data (Unaudited)
 12 Months Ended
Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]  
Selected Quarterly Financial Data (Unaudited)
Selected Quarterly Financial Data (Unaudited)
The following table contains quarterly financial information for 2018 and 2017. The Company believes that the following information reflects all normal recurring adjustments necessary for a fair statement of the information for the periods presented. The operating results for any quarter are not necessarily indicative of results for any future period.

 
2018
 
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter
 
Total
 
(in thousands, except per share data)
Total revenue
$
—

 
$
—

 
$
—

 
$
—

 
$
—

Total operating expenses
4,007

 
9,030

 
14,397

 
$
7,066

 
34,500

Loss from operations
(4,007
)
 
(9,030
)
 
(14,397
)
 
$
(7,066
)
 
(34,500
)
Net loss
(3,963
)
 
(8,958
)
 
(14,015
)
 
$
(6,757
)
 
$
(33,693
)
Net loss per share—basic and diluted
$
(0.11
)
 
$
(0.16
)
 
$
(0.18
)
 
$
(0.09
)
 
$
(0.55
)

 
2017
 
First
Quarter
 
Second
Quarter
 
Third
Quarter
 
Fourth
Quarter
 
Total
 
(in thousands, except per share data)
Total revenue
$
425

 
$
—

 
$
—

 
$
—

 
$
425

Total operating expenses
6,587

 
7,350

 
9,150

 
$
6,593

 
29,680

Loss from operations
(6,162
)
 
(7,350
)
 
(9,150
)
 
$
(6,593
)
 
(29,255
)
Net loss
(6,061
)
 
(7,316
)
 
(9,105
)
 
$
(6,547
)
 
$
(29,029
)
Net loss per share—basic and diluted
$
(0.25
)
 
$
(0.30
)
 
$
(0.37
)
 
$
(0.22
)
 
$
(1.11
)